{
  "manageEntity": {
    "action": "Save",
    "entityId": "185436",
    "entityType": "Track",
    "nonce": "0x64034d3d014482f2dc490f0af1ce0b10eafdeba0d59124104def191fd305af0d",
    "signature": "0x8b2d31de0177beaeae8f144ea9ef3389c9dd6a304bc958e5ffb50db68fedcc5e31689a25a0a429a64276e7e5e1ca7d0e35632449d8fc6b1a7e6797e12e03da361b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}