{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247765801",
    "entityType": "Track",
    "nonce": "0x2c824f2d08b0346c026fbb6a05bb963402d5f0970c68d0f1a069ca31b287f5ca",
    "signature": "0xc03af41810c93cd3d79a898332cded320f395d11f00cbea615d4e05f9d4410e73800c7310a5a53e0034c64b9c2021d3f19e46538bbd11a3934352e5bd880fe4a1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}