{
  "manageEntity": {
    "action": "Save",
    "entityId": "718172986",
    "entityType": "Track",
    "nonce": "0x15964217eaf66ec2c09282dc733f477718bc51c65cdc61a1a5b91b9a3f4040f4",
    "signature": "0x33f7637d514973918224fc1e4ece44d27a01bf5178e5d5a2ef20781e9fce0f7055db0c9f9e5b9130c35e11eb51c017c26e634a05e1bd90b1f5bfa4cb7225804d1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}