{
  "manageEntity": {
    "action": "Save",
    "entityId": "710596",
    "entityType": "Track",
    "nonce": "0xddaa72bf8317a41f4d8d9107dfa9ee0e35050788173be668a2c1a0abf9690157",
    "signature": "0xf80e91bd416885214e2e2c1d876c1836a37f5a65549044ed1e238d01f407d5fa58c02db3b88bac82d838b9519e1727a70627c59e3394f2da85c99c63cc71dad61c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}