{
  "manageEntity": {
    "action": "Save",
    "entityId": "103795830",
    "entityType": "Track",
    "nonce": "0xa5e78551a01a4fdf976ea8b5472c9e892a3856bd90c186af2a3101890b8cbc4e",
    "signature": "0x90d178a8fcffcf33c56a5571fb305955416f4520452fe73c4794e30957c0b360670db1c0d51459d3604377ed897babec419e0e50c82d11c15b95a5e5a679ce3a1c",
    "signer": "0xbf1f8021D15fDffe83FE44dA0b0c9CE22371359e",
    "userId": "276678878"
  }
}