{
  "manageEntity": {
    "action": "Save",
    "entityId": "752761301",
    "entityType": "Track",
    "nonce": "0xddf0d9abbc3a2a009a8efbcaa32ee4fce5d4f52574f93179499ed154a962c978",
    "signature": "0x96ff2e9883cbf03c19936a65e5034e5c00de9c63c26a33f3a7076317c98280aa29b7e50c16a5e6a309dc8e875fc5d8755f9f2cc056949095766ee7db0287e1071c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}