{
  "manageEntity": {
    "action": "Save",
    "entityId": "399104486",
    "entityType": "Track",
    "nonce": "0xc8f44d6b572260fab81cf2f50e729c0ebf9858f6eeeb56ef45e96cf2e953f5e6",
    "signature": "0x3e8fa81a3a2a9875f70517b2496d1dc7b7057120445ab38b53fafe40588bba9a09fdbc2440322b7a54b01920958fdb28611f113708cff1e79812ec68e1dd4e871b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}