{
  "manageEntity": {
    "action": "Save",
    "entityId": "76329054",
    "entityType": "Track",
    "nonce": "0xfbcffad685def4d879bf4823412531a9413079975d54b55cf959280c636f03fb",
    "signature": "0x387757f610adee404cb10edd6af12c8c15f3fbd9c458db03b60b6393b2a07cc94fb8957a23e6726f4c35ce22795b2120852efe7f909d923d01854d5df22c3a121c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}