{
  "manageEntity": {
    "action": "Save",
    "entityId": "633004",
    "entityType": "Track",
    "nonce": "0xd5f6e4d5cb091e15889aa0d7b866adf24210a72391ec4d66aa964d762747c41a",
    "signature": "0x8e5a3745dfdd68bea2a07088e468d6c6d4759b0fe65b701b3b98b0fe142a858c63ccfe2982bd3f33937ec0638db17423bbf5d0a81443424c7d58849982a2377a1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}