{
  "manageEntity": {
    "action": "Save",
    "entityId": "811154719",
    "entityType": "Track",
    "nonce": "0x3dd9c237d23cab4e684aa519b9114fd68154b0d0b512e5f2bcaadb905c6419fb",
    "signature": "0xf67673cb38ff0fa35965666dafeaef35aaaa478a72f33c3534d9dba1f5d7522b51558f9a8d6e932662a152655fb0e325ad162b9af3da1bc5d05634ef3cfaa91d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}