{
  "manageEntity": {
    "action": "Save",
    "entityId": "635210",
    "entityType": "Track",
    "nonce": "0x65a54e4448b854b95f2b2a1624c62dab8d37119e2d88a59d37b5ead3f21761f9",
    "signature": "0xcfc4d51a989a504a84aa5ed1c088d27d9dccd30b33b6f51f3539367fcc50012a7cdb50fb4d55811aed94706533d9404e88e17e5230a0cf35849845d28e33ae831b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}