{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038363",
    "entityType": "Track",
    "nonce": "0xc8bd9d052df9313ed2adb8f6b8c2db96462f6684086f3786212688caaba32fec",
    "signature": "0x09a0ec3a8d1c22d68d326f34c2a790aaeab9b27ec2cdff3468f58125e21902293330027f5892f494ff2941d59c75132b7729aa07cdb1950f5903ea4bce7444e31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}