{
  "manageEntity": {
    "action": "Save",
    "entityId": "65025527",
    "entityType": "Track",
    "nonce": "0x58338f0311381a01b5bbb627bcef52343d425946eff4dd1e0420adc2b5b9b624",
    "signature": "0xc0a51bf714bdcc5380f754dc39101daa5eec520aed45912c57f835916aec8af61e3b6d4e3b6107f649add0a85f6b27aea11ee82f5a229fcd4bb0e74206f7313d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}