{
  "manageEntity": {
    "action": "Save",
    "entityId": "741697994",
    "entityType": "Track",
    "nonce": "0xaad32688d6679a7cc4dd9dc955e2924ff7b5c5978c8c136eef3ced91b149910b",
    "signature": "0x614168f84ded479589fb27da80f00a0beacd8e5aa4d3088a72bf23ab6eaaf92f26ff0673b2f725e3171b017b66b6361de4d9d57f856c02aea8ea147d0d17a2771b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}