{
  "manageEntity": {
    "action": "Save",
    "entityId": "679271",
    "entityType": "Track",
    "nonce": "0x13c6494c9f52586d8e72ee24174e26afb72435f01934da73b6c914eb24654621",
    "signature": "0x8b755d6b7a7dc28d248657a740121460586d111200fe7e0d29bc9809a34b5cec36ad112bda49e6a1eb2784a2e870a17a4bdd6e24b42ee00e387eb56f9ab856f81b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}