{
  "manageEntity": {
    "action": "Save",
    "entityId": "803340076",
    "entityType": "Track",
    "nonce": "0xd8fe73bf62305bdbd5fc449184fe9484c6fb5ed854d55434633510742e2e08ff",
    "signature": "0x696f28fbd529c062b85ebd5e8b6e204ca31774b031598e32da5a7eb0b3dbc3ac7eb3929875a775d6a4202eadae19c1be9e64396729ebe2e85c93f4b85abcbd941c",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}