{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041372745",
    "entityType": "Track",
    "nonce": "0xa493abc0af993e5aaa64c60398eb28c3cd56647fce40a45f764f66b706e77f50",
    "signature": "0x176d9f8e859c05d223483facb3f961877404b9f03599df7a0b16408a65557ed970625986e53d688773e4cc1ebd347a42873e917cc01c0c868330cb3bfdd322001c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}