{
  "manageEntity": {
    "action": "Save",
    "entityId": "1133395718",
    "entityType": "Track",
    "nonce": "0x43ad2fde123951f6dc65fa253e84a63a5306b17f7a74840051006d3b551d45aa",
    "signature": "0x5bfd06b847784c236b938ceab9747bc8fadbe2b67ac9cfed43dd79f54a24ebde2bb70c1271e7b368c9f7248e88a8470e70a361a440b53173d07f01b61684e44c1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}