{
  "manageEntity": {
    "action": "Save",
    "entityId": "1760206493",
    "entityType": "Track",
    "nonce": "0x9eb19d19bb71a0b31f1ce1794500083bde67451aecea1e7296eaac9254c60f5b",
    "signature": "0x3a88a5152b510bda72c24ec1dc6cf02b21a77e3063eb873a78c3e01bad59c02d788c4ff0909533d97644f74e0ef93ad6dae0cf30131b6d7d3e37de41f0f905dd1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}