{
  "manageEntity": {
    "action": "Save",
    "entityId": "692198",
    "entityType": "Track",
    "nonce": "0xd0122b098fc3b0d38525ce5a5cf94eed39d51198a81987f77b3ebc764eb98f6d",
    "signature": "0xd77b69764d8ae86e3fcaee7275d394a471121221bf7f16b5622f50f2698ec79d699689347acd4ff19d5dbce8d9774a3ebd6f03a86e0c5c1a77428090f0abec9e1b",
    "signer": "0x645f1F313A6B28717086d47DCd9f8B9fa0f9CCf4",
    "userId": "809556217"
  }
}