{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985672676",
    "entityType": "Track",
    "nonce": "0xb2384f5e7b79423100ff241a4017805efabb4fff3b70a281a9b9078f1118ce17",
    "signature": "0x1bca53fb0dcf33fb23d83f110574945bf9ea140121fab74d8f8be0066759e4ff7c0b4994a268d185a27e42c72a27aaf0147b5936d085fc5ed08a9098d42771f11b",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}