{
  "manageEntity": {
    "action": "Save",
    "entityId": "1351976220",
    "entityType": "Track",
    "nonce": "0x2aa264477ca2b88638e057a9837ba44265ecd6dbb90fd76f71fdd6649db94c70",
    "signature": "0x46984c3a7c5e3551dd3923f3178a47927cf58199cd6a9522b96042c0349b9b1764df8d8b8b1935d11e7dd4ed4dd599dc834faa9dee47b20a188246edd211489f1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}