{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120028740",
    "entityType": "Track",
    "nonce": "0x359631b65120c0a368a5baa7197bf90b3fcb059bb6f8401522049f480de2c73c",
    "signature": "0xd40fa344d88b095f2e75d29ce7589db5962fa194fcfb76e3af3abe3cbe886989442a2c0bd88dc9b0cb262115032e88b5323366b5f106c33d36ad334f7c6d80601c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}