{
  "manageEntity": {
    "action": "Save",
    "entityId": "460282622",
    "entityType": "Track",
    "nonce": "0x0a38d433d77c334256df2e3cd84d584ce41a6c5e5f93bca28a9d11aad2944220",
    "signature": "0x98ef897cf8f9626b0601875d6e62ec9d6c7a858c56026fbe40c4d99fcf3a26a17778fd49a92cc12fd37ef12dc5784a8c2eec5126154254bfc3f403f574b51ba91b",
    "signer": "0x0246262E4959323EAC2FBf603C6D24352d57Fc51",
    "userId": "700531000"
  }
}