{
  "manageEntity": {
    "action": "Save",
    "entityId": "278821879",
    "entityType": "Track",
    "nonce": "0xbfdf0af16cb416cf23037eb4f12638c89b7a2085431641bcf0ff8caf89925f6a",
    "signature": "0x14ff2699f184ceadc093adca170c376bdd3e45608db811de652d2173b91647900d61cfc1376a1a65d7217015590dd4271096b386bdaff7c429bd386e1cff36b31b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}