{
  "manageEntity": {
    "action": "Save",
    "entityId": "28027957",
    "entityType": "Track",
    "nonce": "0x35652e24ad6145c793d72321e6182c42980692d50dff60cd4cd1e17616020c6e",
    "signature": "0xfa9959bc6904c63b132420ebd0c486211470b330390e113cf7beff1f9be570cd2f5f2c18b2f6eb0dc575d0805902eb8078ed096863afaf8db4385f05dc6e63ca1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}