{
  "manageEntity": {
    "action": "Save",
    "entityId": "887791760",
    "entityType": "Track",
    "nonce": "0x8463091575c5504268f104264d500667b617ab342d757007d714604e59d1c16e",
    "signature": "0xd8dedfe46c7a3c8ea54babebaa9fed797a982f30451abf52a2f90b16ff65fb4f0a80c5046eb62a722a17a729b94b5200483f5e7dd60c78779748ac56ded196141c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}