{
  "manageEntity": {
    "action": "Save",
    "entityId": "1741858356",
    "entityType": "Track",
    "nonce": "0x1c6a27a1fb014565cac90d5f7ff05fd040946f916a90c6fb6722865eb4664179",
    "signature": "0xa4f2d2995c811a96e5b3adb4cfdc082255ce3463634919f4a91d213a4e957706643208f30d0083afdc71c1b8726eefbc0085c9677c562c02e99693e50078148b1c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}