{
  "manageEntity": {
    "action": "Save",
    "entityId": "1390696618",
    "entityType": "Track",
    "nonce": "0x4211cc99287f04be7d4cbc66a37e1e1c227279b0541c9a19cdfac7f40dc19507",
    "signature": "0x3622a39e48f62f3d14aaa5ba3f992c0f1a6fd38f2dc5c7f999794d0bf4ae669e62a2e156008f267e25a74a1be5fde39a664290fabceca7fda4b1b2021c6724291c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}