{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174802729",
    "entityType": "Track",
    "nonce": "0x4488bb4288095d48b874b3a219c608f89a523faa6650e8242395beec19636185",
    "signature": "0x3b669fc98fee9f0c8c9776ab4b422956d9d85209fb16365a715397e383fa13f16b611d3d5a9fc464e54217aacf49180bdacbd1d509cd52d6f8218cbb68ce59621c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}