{
  "manageEntity": {
    "action": "Save",
    "entityId": "2070722101",
    "entityType": "Track",
    "nonce": "0x90c47aa09d1a1a91d06f2d7343799b14f8819e910749888b5df9f5829ec59af4",
    "signature": "0x128299471f3172e2dfe2cc5870ebb75399ad3bbc1f606e8cc9507c98c21174b53f204418c68f66fee76bde21e12b113ed16bf1e50be756a57e0f7fa91aa38e881b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}