{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115231460",
    "entityType": "Track",
    "nonce": "0x9f4515de9e786e50349676b0e98e2a2ecc6af6a4e4f1ab8d2124b23361ab8d33",
    "signature": "0x0fb841718b382c542f603f8e906ca9f980c0f6588df90236fe950d45d68a9cc73f83db2b7914b355b1b198e9ea44a3c3b19d8b2740380115185d00517b562fab1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}