{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115265404",
    "entityType": "Track",
    "nonce": "0xd377a3d92fc94e5b6c7d9a0d6e8ed759c5d5525aab832bea29096b26e773485a",
    "signature": "0xc3842e25ed5abf2c47550969ca19a3180db72bcae4dd10b603be2d355ce8341b0c332c2d3d01ab34b9f49fc66aa1a97d9fc635e17a891a7fd0c27d64584105921b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}