{
  "manageEntity": {
    "action": "Save",
    "entityId": "784232981",
    "entityType": "Track",
    "nonce": "0x9c50334182bd0006eaa184868838790abf4c9f596d685094b4f5abdeeb609d0a",
    "signature": "0xef9f9310f6969492324118d8e95602fec5a4b2a23581d5dfd5dc8cfa2753e6937c0be127c3ad5893b766764494fc0c16d546e0d0ca7c35cebf902b615c8018cf1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}