{
  "manageEntity": {
    "action": "Save",
    "entityId": "1042892",
    "entityType": "Track",
    "nonce": "0x4f1a42a3a3262f8a3c249d94e3b4e9848f7daf2496fe1ec4e049ec267d0387ae",
    "signature": "0x3a10e082fcc2b87ba399cec3a895a1b786f33c78b80f5390ce83ba132939a9737343803ac278c4ea827b2adc487e247c39218b540c57c81a2c84ba07ebf9149d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}