{
  "manageEntity": {
    "action": "Save",
    "entityId": "55506",
    "entityType": "Track",
    "nonce": "0x7cb56b0b99bb3c7aa9ed411250b38a68912fb47bb16e9ed30ea3f2f23d75e90f",
    "signature": "0x29d2d08d790ecfa8bbb84300a9a550d9b7da806a4d9a75cde9ca1eeaba4e92554a4a0625976f26b56ba84a1d31e332e6ff7f36bf3031a61516b26556e3762c5e1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}