{
  "manageEntity": {
    "action": "Save",
    "entityId": "623546514",
    "entityType": "Track",
    "nonce": "0x452dca1c93bf9ecf22f975699996a0efd14c6efbda12cfffd440d7919f06a6fd",
    "signature": "0xf8b90490b6fdc0a746bfca0cec409460b164e4b3e10491e2a7249c1880c761c00e3217a1e076f3e22ecea6bda4d4ca8a5ea7a6915cb45e4c495a80d2198153e91c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}