{
  "manageEntity": {
    "action": "Save",
    "entityId": "838835953",
    "entityType": "Track",
    "nonce": "0x0841f888abb1f4c88905e23aed6d7e0a54f1397a87f5ef92d7c01fa699dc521a",
    "signature": "0xded2313ae3baf5aae3495d4f0774268053bd733a69b27da338d0bf6ce7286b8f5842b0992425b7d3409b1b25f1a8f083fa2a0e75eaf3cf3ba9e143e2700b64ee1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}