{
  "manageEntity": {
    "action": "Save",
    "entityId": "65843",
    "entityType": "Track",
    "nonce": "0x3021ad33eeeaa0a46907f2d22da435454676f386eeed3f2f85650e8facff18cb",
    "signature": "0xfa40df29d2f5791faee97fe6b0d74fcc6185e3679bb6f9fa26669edf45e8f8c154d4ce7bbc657157d7414e22fa0c664669f3cd0ec3fe571959ecd68c049e49821b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}