{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150830828",
    "entityType": "Track",
    "nonce": "0x12b33eede2ee6b5ad04a234a1e69f00f27c01bb35f3fcede97026234a9139268",
    "signature": "0x5602a5383355a1d643783d9dd47192fc3cc42147e9d314a038d417795951f0f6708b5cd20a5e7e3f1af9d2daf52cdc57ef58a430c6a9645bf427106d06e89e0a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}