{
  "manageEntity": {
    "action": "Save",
    "entityId": "2063996559",
    "entityType": "Track",
    "nonce": "0xa757680fcba3f49949d36883321c56cd0fc43255f836e1ac7eb9517da2ee55cc",
    "signature": "0xc49f7f4adb71db8f43a36877742a01f8b9a9dd3bc00a0a9883b6616196b8e0de582fce4ee44e5d83df2e4bcf9e3230cc65caa54b76f917c2d76067687ae8caa81b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}