{
  "manageEntity": {
    "action": "Save",
    "entityId": "1848435441",
    "entityType": "Track",
    "nonce": "0x9ec5117d98e6e2510634d99b9cca3b596037f693dba578d9946f8e35522a0893",
    "signature": "0x066a00e08c67d3b6edad80308f086c01c7a77762de1997be2d640cf1660bf1051502e387076293821380cc2c58c6bb79875a4d02545a7eab1438ec0cdda9560d1b",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}