{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969413931",
    "entityType": "Track",
    "nonce": "0x0b3086eec56af70a2b1e56b5a232dba39b8f94415bb1f34c8a59d3a8b5ce9d3c",
    "signature": "0x6f63976b22bb4bd36d52eacb117c781cc51d55095fb66576397c0b25977a11566ccbbcf41130d412e10d73926fd76ebdb2148553e617d217440fbdfa8a6f84201b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}