{
  "manageEntity": {
    "action": "Save",
    "entityId": "1946286925",
    "entityType": "Track",
    "nonce": "0xc5fa5f860de5ff6ab17ede273d94eb631b1d44b73fab79ad51cd18f620a07874",
    "signature": "0xf2ed4f147bc7cb4a34d1d7be381a4e8612aecc1bab9ae3bce5ea39e5a72c16b970aa25e24944d749e46e2b4fe4d7794e1729e2a90bf6e007f773de36670af8ae1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}