{
  "manageEntity": {
    "action": "Save",
    "entityId": "682120476",
    "entityType": "Track",
    "nonce": "0xdd59aaa8f21fffb20aa02dad4dfe1e3543fd0accc2420ecded4dfa06c05bb0a8",
    "signature": "0x9bdc3fd5efc1e123e5ee946a8f8f38c8853e1b150e52c3e25fcec1beadcee7c90728965697ccb8e5d4d06922665b4462bdc02332edd84115060c74c5ee06abfb1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}