{
  "manageEntity": {
    "action": "Save",
    "entityId": "1008976",
    "entityType": "Track",
    "nonce": "0x29160565cefb69f47b7a55028795a2831d18d5519f197fac1b846d95b4786de7",
    "signature": "0x61dda0a1b79d5ccae6ee582f340d2c3b59d7bb6191230b0b327f1f00b4768dd862d34a92861a2aeed4cdf509a17867388527ac9cb9373fa6fa5431f2bc2938ec1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}