{
  "manageEntity": {
    "action": "Save",
    "entityId": "768254608",
    "entityType": "Track",
    "nonce": "0x17c15184992ead5572c588b3a0b660e138b6a58eb20c79920260b46c5060e333",
    "signature": "0x2009960d81645088d393812b65604b1c72b2b1aa7c03685ce74be77f8ba9d082315d506667ca9f9dbc18752f434bc78591d727457ddacd86916449f0fd371ee51c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}