{
  "manageEntity": {
    "action": "Save",
    "entityId": "1890650636",
    "entityType": "Track",
    "nonce": "0x6cb847a0a778835c834f090fe22c12cdefd5db6fe940b85ba3323f9b6fde26bf",
    "signature": "0x051a0146a4f82980d9517c2cac86fc4c48ac1901cbda56186b4ce0129bca9c405f53ce410538d9b6a1cc7238290d8aae3854dae97c810789891112ee1706ac401b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}