{
  "manageEntity": {
    "action": "Save",
    "entityId": "18475954",
    "entityType": "Track",
    "nonce": "0x6dee315cc230ca921868a2e42510adcc6af9f3e5e8cfef2e3af3296b37786af8",
    "signature": "0x6d489a0e0cdb540472c5dc8086c327026ef5468ae6819a0ed1cdcd85b34b332a74a12169eb3e0bac9adffe755e33dadfc5d4414bc4c6e2eaf368014392a307af1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}