{
  "manageEntity": {
    "action": "Save",
    "entityId": "70789",
    "entityType": "Track",
    "nonce": "0x721d206cd71e02a9ebd449a5bb47fca14ea7576919a482a676a6b81f599178ac",
    "signature": "0x005fe20c962bc410aa1a7074a17117220bafbf6dd4efc01355bd75ab924fa18b0811d61a69fa3a8ddb3898e32a22340192916a7082d71bdb7fb321c869770b311c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}