{
  "manageEntity": {
    "action": "Save",
    "entityId": "437161",
    "entityType": "Track",
    "nonce": "0xb81217e2e76ee645be41d449cf3aae2e1131c9f30c78aeb82a564b9ff4c1c0f9",
    "signature": "0x3bded765e020cce7b197c39d462bff452ce4fb6c7c462d45cb26831ae753df8d63dc20dd8279396051d43dddfd72e657cea93a59d627d94d384a224cb30200071c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}