{
  "manageEntity": {
    "action": "Save",
    "entityId": "374025582",
    "entityType": "Track",
    "nonce": "0x93cb936db0417ea5640c7a8c8224c4e38f778838ac9fd06e50115160196b83c4",
    "signature": "0x973b2c72b03b7f70673113257500bd4a711d1a937d36ce435539f85cb87e0f986374be45145bd665175d3ad290dd9454d3d2e51e1c4a698560e42d1cbb59eeba1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}