{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959614122",
    "entityType": "Track",
    "nonce": "0x69cd821b17eb9cdbcd349ebac72d7230efbd24a61eeda86c6a2299fa56d1242e",
    "signature": "0xc1cfe1680bce59ae650795b47076f16ce97cd870e102e3228394effc11ed4f1943e4ecdb692bca7d8cce666391298f4810061f793146d5edcb5869266d52e6601b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}