{
  "manageEntity": {
    "action": "Save",
    "entityId": "739114",
    "entityType": "Track",
    "nonce": "0x5b87e3234dc4af11ff2bdaf6053b0d539ebc4e862c5a8f865ec1fbb9feddabc6",
    "signature": "0xea28e7a812d45427b40c11613ab18d68b211623feceec4b5815f0e1338ac38951e2c22069623a7f594f5269535db4188dada62bc8faac41620dfe265776d1c4e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}