{
  "manageEntity": {
    "action": "Save",
    "entityId": "156667570",
    "entityType": "Track",
    "nonce": "0xc484dd587b0ba7c15f3b7e6e516224c1f49dd8f023ff40201a5180b250838e03",
    "signature": "0xccb593980bd16ca56ab172f7e06a60c5a7d8c53e934f4776b339742fbbb559a325b6662e08d6f1e0b27c60f8f1118d08eab4860759116e00fb8af1bc56beba6d1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}