{
  "manageEntity": {
    "action": "Save",
    "entityId": "1770369921",
    "entityType": "Track",
    "nonce": "0x0ee1f0031670a009be57b1e1a87002e40d513a76d1e959d69795ea4677bc87b5",
    "signature": "0x4261f11a20a6afbd0446a7eeacfa6b95e10456fb22501bb03a50b20c08523018377c2c8ed4a2bf43e2901c2b131f8f0cf87859ccd66352d400c3860cae5918461b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}