{
  "manageEntity": {
    "action": "Save",
    "entityId": "1253434176",
    "entityType": "Track",
    "nonce": "0x4110b67f214e9369a29359799f9dc0eb204cd2b4f974c35a79d3ac1bf4f85e1f",
    "signature": "0x15a86018bf23655cff548273b6f09cef3f0f02357df711bbd6c3066812e052be766bccefe0aed5a8fa67e56e4d3579d352c5cc0700258407d03983ac0cfd83cc1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}