{
  "manageEntity": {
    "action": "Save",
    "entityId": "2090210736",
    "entityType": "Track",
    "nonce": "0xce22661ad8f34bd143f844ff051510c42f55eb7562704009c02ab5b71ae979a3",
    "signature": "0x9bb9ebee97a93fffe7d81064978f14382efbfa800bad984ffed76110ad8e1fda671f6aa47899a93240efb0ddc6d7fea831fe3bc9757f722ecca9979999663dc01b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}