{
  "manageEntity": {
    "action": "Save",
    "entityId": "315192201",
    "entityType": "Track",
    "nonce": "0xa943e939a1ae57a6283d5281edcb8058f6c3f3cd3513123cfc63c6da3698653e",
    "signature": "0x1dfa8e87602f1f9a9d055918babaea8d91ef0b2152bb5cec5e029f878a10387e22d9f830211618b5a899e8c3b806ef958b2df66bf330cb3b1d7739345e09638f1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}