{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775949226",
    "entityType": "Track",
    "nonce": "0xfef7cb22f47de1425dc26c21de4cdeda2aa4d6d0582f9996e1f42c64574f5c57",
    "signature": "0x78db38d2ef9b27dc99f91134260df5ee3a28273eae9a741a09c62d79612aaa30297f05a96e60101b3380ae6ffa227be71113c6946443fa96005dd4d4680548981b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}