{
  "manageEntity": {
    "action": "Save",
    "entityId": "1816247397",
    "entityType": "Track",
    "nonce": "0x4d301b35fa35fc43c4172b5dc879c77f7ee39048171bb6980878daf9f0e0b79f",
    "signature": "0x72a405eaaf6bdc1fa4e82f11125ee9e2472ed3405f77495e9a78cf51dbabd15a79028f256b50053c685e75ce1634fe50fcc35e96e7160e1eed024c15ac23f7671b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}