{
  "manageEntity": {
    "action": "Save",
    "entityId": "1224730011",
    "entityType": "Track",
    "nonce": "0x9cbdefa4ca1e49e4b5b534688ae517340262223531b8255e7d573a8752d5fa0d",
    "signature": "0x72ec423e096d764863a72527b165c100be38eccf7af743a958be515d854146c42be8547125f414fd71b6517cc31cc0454a75228410e0fe71dea090e733f898331c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}