{
"manageEntity": {
"action": "Save",
"entityId": "1850103676",
"entityType": "Track",
"nonce": "0xb7542038bb8107f8af26e8b5c6ffc14ebfcebc230869e84403b2fdb7fc0736f6",
"signature": "0x68619d43e555db27dc3e33a18bab1c50a8d4bda869c434c99615c200c50997914707405e6c2e2e5e8b084245722e1892bda0a7a909545ea050230a9495a5b64d1c",
"signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
"userId": "636236864"
}
}