{
  "manageEntity": {
    "action": "Save",
    "entityId": "505213",
    "entityType": "Track",
    "nonce": "0xec9c2efe8d03c02a1f95e72a551a8a0fbcf3c9905722cc97ec59132702f22daf",
    "signature": "0xd06dc8ed8ba43cc23382be3979c13794216475702205c2116e249996c1a7c32a668978c2f8309f96a1105bd349baf40ad61d9e692100899f726722f91dd4eb851b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}