{
  "manageEntity": {
    "action": "Save",
    "entityId": "1799729804",
    "entityType": "Track",
    "nonce": "0x270379e2a6729febf290386123439b85ac05b1df8eaeaa958ad5c601833e0dc4",
    "signature": "0x7500472d9196e0a8e5260104415905aea91ecd9b796a0d89e32a3198939311e60e5f7d2ffae38646e27b436d522fdcd6ba80f7c3e57cd3f2ff4e4011e5e5bbee1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}