{
  "manageEntity": {
    "action": "Save",
    "entityId": "214905950",
    "entityType": "Track",
    "nonce": "0xf24ef5128a98c81b761b918005151e72a10bc1ad29f8a29bb04552133428ad3f",
    "signature": "0x8cd4b42c01e3f28a1848a389c2609c05250ec42c874cde548105deb3e51559fe2c4317f8d6a889f9f97cc797a50168a29bdb7064204b303cade78e0c408eae741b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}