{
  "manageEntity": {
    "action": "Save",
    "entityId": "913915037",
    "entityType": "Track",
    "nonce": "0x43d497611c4a0c0a7f55a86bf048db52850ec82b9e68341024a44f99abe648a7",
    "signature": "0x2c98a033caf2dac74fe8c88c920fcf430314827a6bd3fe66223c60ec2b9f06b47586879b9294dc865f4300b9056c1a4c74aacd55724f7aaa6b67aa8d7c8f9b4e1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}