{
"manageEntity": {
"action": "Save",
"entityId": "77980511",
"entityType": "Track",
"nonce": "1789663192875114657",
"signature": "0x756c33d60760f49a3747ce5f66d86b39ad0f177baa78f1f0030c840ecf8259fa2b79fb3118751c3283cf23a1529c89d06869d6321b7809492509589aff67f39a1b",
"signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
"userId": "451691735"
}
}