{
  "manageEntity": {
    "action": "Save",
    "entityId": "1206621427",
    "entityType": "Track",
    "nonce": "0xd8adac7175bca97aa322716cec2926ec5113ba74a1ab2de94cbfb7361851b829",
    "signature": "0x43166ed9540dbadf3aed8a193d5f56f52ea015f2c77be649c29ae8e23fbff61f6b879d3f40fe1f6b57ee140029696e5cd98ff4ad5d3886d3ee671599efd7af871c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}