{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963400828",
    "entityType": "Track",
    "nonce": "0x0148c6646d4e5f454fb9b58991b96bd9bf0b22b82f30748286e9b974918feb09",
    "signature": "0xd23b59fc6f2552e7272ef41407821adce94f045b0b91bf9c7304d949ee3b50c90eba7e4782e84ebdd57f15a2de987f2cd8b715e00325f3aeb56466ddb6851e731b",
    "signer": "0xcC8B6d3513331fFFD055058efBf7E340B4d3A7BA",
    "userId": "174894112"
  }
}