{
"manageEntity": {
"action": "Save",
"entityId": "1387942429",
"entityType": "Track",
"nonce": "0xeea0983ac09d505d1c4781dbb33b58801075cf74dfe039e4264a190e51796310",
"signature": "0x1d43e887d041829e10ab80c9a28afd0ebe401784077a2f60993351b1b2355ee656c2440b4c4a71a226c2e03a1416a3786fb459fa0e17105e7a572f86a818277d1b",
"signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
"userId": "881446128"
}
}